Mechanical pencil



FIG. 1 is a front elevational view of a mechanical pencil showing our new design, with the writing tip and the eraser in the retracted position;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a right side elevational view with the writing tip and the eraser in the extended position. 

The ornamental design for a mechanical pencil, as shown and described. 